:root {
    --primary: #0b2b4a;
    --accent: #1a7fd4;
    --accent-light: #e8f2fb;
    --text: #1e2a36;
    --text-muted: #5a6b7b;
    --border: #e3e9ef;
    --bg-alt: #f6f9fc;
    --white: #ffffff;
    --danger: #c0392b;
    --radius: 10px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text); line-height: 1.7; background: var(--white); }
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1.5rem; }

/* ---------- 按钮 ---------- */
.btn { display: inline-block; padding: 10px 22px; border-radius: 6px; font-weight: 600; font-size: 0.95rem; border: 2px solid transparent; cursor: pointer; transition: 0.2s; text-align: center; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #1468b0; border-color: #1468b0; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }

/* ---------- 头部 ---------- */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-top { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.35rem; color: var(--primary); white-space: nowrap; }
.logo i { color: var(--accent); font-size: 1.5rem; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > a, .nav-dropdown > a { padding: 8px 14px; border-radius: 6px; color: var(--text); font-weight: 500; font-size: 0.95rem; display: flex; align-items: center; gap: 4px; }
.main-nav > a:hover, .nav-dropdown > a:hover, .main-nav > a.active { background: var(--accent-light); color: var(--accent); }
.nav-dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 8px 24px rgba(0,0,0,0.08); min-width: 180px; padding: 6px; }
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-radius: 6px; color: var(--text); font-size: 0.9rem; }
.dropdown-menu a:hover { background: var(--accent-light); color: var(--accent); }
.header-actions { display: flex; gap: 8px; flex-shrink: 0; }
.header-contact-bar { background: var(--bg-alt); border-top: 1px solid var(--border); font-size: 0.85rem; }
.header-contact-bar .container { display: flex; gap: 24px; padding: 8px 20px; flex-wrap: wrap; }
.contact-item { cursor: pointer; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.contact-item i { color: var(--accent); }
.contact-item small { color: #8a9aa8; }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; }

/* ---------- Hero ---------- */
.hero { background: linear-gradient(135deg, #0b2b4a 0%, #163f68 100%); color: #fff; padding: 72px 0; }
.hero-inner { display: flex; align-items: center; }
.hero-text h1 { font-size: 2.4rem; line-height: 1.25; margin-bottom: 16px; }
.hero-text p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 28px; max-width: 620px; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .btn-outline { color: #fff; border-color: rgba(255,255,255,0.7); }
.hero .btn-outline:hover { background: #fff; color: var(--primary); }
.page-hero { background: var(--bg-alt); padding: 48px 0; text-align: center; border-bottom: 1px solid var(--border); }
.page-hero h1 { font-size: 2rem; color: var(--primary); margin-bottom: 6px; }
.page-hero p, .page-hero time { color: var(--text-muted); }

/* ---------- 区块 ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: 1.7rem; color: var(--primary); text-align: center; margin-bottom: 36px; position: relative; }
.section-title::after { content: ""; display: block; width: 50px; height: 3px; background: var(--accent); margin: 10px auto 0; border-radius: 2px; }
.product-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.product-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 18px; text-align: center; color: var(--text); transition: 0.25s; }
.product-card:hover { border-color: var(--accent); box-shadow: 0 8px 24px rgba(26,127,212,0.12); transform: translateY(-4px); }
.product-card i { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }
.product-card h3 { font-size: 1.05rem; margin-bottom: 6px; color: var(--primary); }
.product-card p { font-size: 0.85rem; color: var(--text-muted); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature { text-align: center; padding: 24px; background: #fff; border-radius: var(--radius); border: 1px solid var(--border); }
.feature i { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }
.feature h3 { font-size: 1.05rem; margin-bottom: 8px; color: var(--primary); }
.feature p { font-size: 0.9rem; color: var(--text-muted); }

/* ---------- 文章卡片 ---------- */
.article-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.article-list.full { grid-template-columns: repeat(2, 1fr); }
.article-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: #fff; color: var(--text); transition: 0.2s; }
.article-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.article-card img { width: 100%; height: 180px; object-fit: cover; }
.article-card-body { padding: 16px 18px; }
.article-card-body h3 { font-size: 1rem; color: var(--primary); margin-bottom: 6px; line-height: 1.4; }
.article-card-body time { font-size: 0.82rem; color: var(--text-muted); }
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 32px; }
.pagination a { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 6px; border: 1px solid var(--border); color: var(--text); }
.pagination a.active, .pagination a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- 内容页 ---------- */
.content-page { max-width: 900px; }
.content-page h2 { font-size: 1.4rem; color: var(--primary); margin: 28px 0 12px; }
.content-page h3 { font-size: 1.15rem; color: var(--primary); margin: 22px 0 10px; }
.content-page p { margin-bottom: 12px; color: var(--text); }
.content-page ul { margin: 0 0 16px 22px; color: var(--text); }
.content-page li { margin-bottom: 6px; }
.product-icon-lg { font-size: 3rem; color: var(--accent); margin-bottom: 16px; }
.cta-box { margin-top: 32px; padding: 28px; background: var(--bg-alt); border-radius: var(--radius); text-align: center; }
.data-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.92rem; }
.data-table th, .data-table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.data-table th { background: var(--bg-alt); color: var(--primary); font-weight: 600; }
.article-cover { border-radius: var(--radius); margin-bottom: 24px; max-height: 420px; object-fit: cover; width: 100%; }
.article-body { font-size: 1.02rem; line-height: 1.9; color: var(--text); }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; max-width: 960px; }
.contact-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; background: #fff; }
.contact-card h3 { color: var(--primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.contact-card h3 i { color: var(--accent); }
.qr-box { margin: 18px 0; text-align: center; }
.wechat-qr { max-width: 240px; margin: 0 auto; border: 1px solid var(--border); border-radius: 8px; }
.qr-placeholder { width: 220px; height: 220px; margin: 0 auto; background: var(--bg-alt); border: 2px dashed var(--border); border-radius: 12px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--text-muted); }
.qr-placeholder i { font-size: 3rem; margin-bottom: 8px; }
.copyable { cursor: pointer; border-bottom: 1px dashed var(--accent); }

/* ---------- 页脚 ---------- */
.site-footer { background: #fff; border-top: 1px solid var(--border); padding: 48px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-col h4 { color: var(--primary); margin-bottom: 14px; font-size: 1rem; }
.footer-col p, .footer-col a { display: block; color: var(--text-muted); font-size: 0.9rem; margin-bottom: 8px; }
.footer-col a:hover { color: var(--accent); }
.footer-col .copyable { display: inline; border-bottom: 1px dashed var(--accent); cursor: pointer; }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 32px; padding: 16px 20px; text-align: center; font-size: 0.82rem; color: var(--text-muted); }
.mobile-bottom-bar { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: #fff; border-top: 1px solid var(--border); padding: 10px 16px; gap: 10px; z-index: 200; box-shadow: 0 -2px 12px rgba(0,0,0,0.06); }
.mobile-bottom-bar .btn { flex: 1; }

/* ---------- 后台 ---------- */
.admin-login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg-alt); }
.admin-login-box { background: #fff; padding: 40px; border-radius: var(--radius); box-shadow: 0 10px 40px rgba(0,0,0,0.08); width: 100%; max-width: 400px; }
.admin-login-box h1 { font-size: 1.3rem; color: var(--primary); margin-bottom: 24px; text-align: center; }
.admin-login-box label { display: block; font-size: 0.88rem; color: var(--text-muted); margin-bottom: 6px; }
.admin-login-box input { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 16px; font-size: 1rem; }
.error { color: var(--danger); font-size: 0.9rem; margin-bottom: 12px; }
.admin-body { display: flex; min-height: 100vh; background: var(--bg-alt); }
.admin-sidebar { width: 210px; background: var(--primary); color: #fff; padding: 24px 14px; flex-shrink: 0; }
.admin-sidebar h2 { font-size: 1.1rem; margin-bottom: 20px; padding-left: 10px; }
.admin-sidebar a { display: block; color: rgba(255,255,255,0.82); padding: 10px 14px; border-radius: 6px; font-size: 0.9rem; margin-bottom: 2px; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: rgba(255,255,255,0.12); color: #fff; }
.admin-sidebar a.logout { margin-top: 20px; color: #ffb3b3; }
.admin-main { flex: 1; padding: 32px; max-width: 1100px; }
.admin-main h1 { font-size: 1.5rem; color: var(--primary); margin-bottom: 20px; }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-card span { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }
.stat-card strong { font-size: 1.8rem; color: var(--accent); }
.admin-quick { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.admin-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; font-size: 0.9rem; }
.admin-table th, .admin-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; }
.admin-table th { background: var(--bg-alt); color: var(--primary); }
.admin-table tr:last-child td { border-bottom: none; }
.admin-form label { display: block; font-size: 0.88rem; color: var(--text-muted); margin: 14px 0 6px; }
.admin-form input[type=text], .admin-form input[type=password], .admin-form input[type=url], .admin-form textarea, .admin-form select { width: 100%; padding: 10px 13px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.95rem; font-family: inherit; }
.admin-form fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; background: #fff; }
.admin-form legend { font-weight: 700; color: var(--primary); padding: 0 6px; }
.admin-form button[type=submit] { margin-top: 18px; }
.admin-thumb { max-width: 160px; border-radius: 6px; margin: 8px 0; border: 1px solid var(--border); }
.admin-msg { background: var(--accent-light); color: var(--primary); padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.admin-pre { background: #1e2a36; color: #d4e6f1; padding: 16px; border-radius: var(--radius); overflow-x: auto; font-size: 0.85rem; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .admin-sidebar { width: 180px; }
}
@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 16px; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
    .main-nav.open { display: flex; }
    .main-nav > a, .nav-dropdown > a { width: 100%; }
    .dropdown-menu { position: static; box-shadow: none; border: none; padding-left: 16px; display: none; }
    .nav-dropdown:hover .dropdown-menu { display: none; }
    .nav-dropdown.open .dropdown-menu { display: block; }
    .mobile-toggle { display: block; }
    .header-actions { display: none; }
    .header-top { position: relative; }
    .hero-text h1 { font-size: 1.7rem; }
    .hero { padding: 48px 0; }
    .product-grid { grid-template-columns: 1fr 1fr; }
    .article-list, .article-list.full { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .mobile-bottom-bar { display: flex; }
    body { padding-bottom: 64px; }
    .section { padding: 40px 0; }
    .admin-body { flex-direction: column; }
    .admin-sidebar { width: 100%; display: flex; flex-wrap: wrap; gap: 4px; padding: 12px; }
    .admin-sidebar h2 { width: 100%; margin-bottom: 8px; }
    .admin-sidebar a { padding: 8px 10px; font-size: 0.82rem; }
    .admin-main { padding: 20px 16px; }
}
@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .hero-btns .btn { width: 100%; }
    .header-contact-bar .container { gap: 12px; }
}
/* ---------- 上传 Logo ---------- */
.logo .logo-img {
    max-height: 54px;
    width: auto;
    display: block;
}
/* 页脚也复用一个 Logo（可选） */
.footer-logo-img {
    max-height: 36px;
    width: auto;
    margin-bottom: 12px;
}
@media (max-width: 768px) {
    .logo .logo-img { max-height: 34px; }
}
/* ================= 通用补充 ================= */
.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    max-width: 760px;
    margin: -20px auto 36px;
    font-size: 0.98rem;
}

/* ================= 面包屑 ================= */
.breadcrumb {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--accent); }
.breadcrumb .sep { margin: 0 6px; color: #b8c4ce; }
.breadcrumb .current { color: var(--text-muted); }

/* ================= 首页平台信息 ================= */
.platform-stats { background: var(--primary); color: #fff; padding: 32px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; text-align: center; }
.stat-item strong { display: block; font-size: 1.8rem; color: #6ec1ff; line-height: 1.2; }
.stat-item span { font-size: 0.88rem; opacity: 0.85; }

/* ================= 为何选择 ================= */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px 22px; transition: 0.25s;
}
.why-card:hover { border-color: var(--accent); box-shadow: 0 8px 24px rgba(26,127,212,0.1); transform: translateY(-3px); }
.why-card i { font-size: 1.8rem; color: var(--accent); margin-bottom: 12px; }
.why-card h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 8px; }
.why-card p { font-size: 0.92rem; color: var(--text-muted); }

/* ================= 产品卡片补充 ================= */
.product-link { display: inline-block; margin-top: 10px; font-size: 0.82rem; color: var(--accent); font-weight: 600; }

/* ================= 全球奖项 ================= */
.awards-section { background: linear-gradient(135deg, #0b2b4a 0%, #163f68 100%); color: #fff; }
.awards-section .section-title { color: #fff; }
.awards-section .section-title::after { background: #6ec1ff; }
.awards-section .section-subtitle { color: rgba(255,255,255,0.8); }
.awards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.award-card {
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius); padding: 24px 18px; text-align: center; transition: 0.25s;
}
.award-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-3px); }
.award-card i { font-size: 1.8rem; color: #ffd166; margin-bottom: 10px; }
.award-card h3 { font-size: 1rem; margin-bottom: 6px; }
.award-card p { font-size: 0.8rem; opacity: 0.75; }
.award-note { text-align: center; margin-top: 24px; font-size: 0.78rem; opacity: 0.6; }

/* ================= 关于我们监管 ================= */
.reg-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 18px 0 10px; }
.reg-card { background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.reg-card i { font-size: 1.6rem; color: var(--accent); margin-bottom: 10px; }
.reg-card h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 8px; }
.reg-card p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ================= 横向发展历程 ================= */
.timeline-wrap { overflow-x: auto; padding: 10px 0 20px; }
.timeline { display: flex; gap: 20px; min-width: max-content; position: relative; padding-top: 30px; }
.timeline::before {
    content: ""; position: absolute; top: 12px; left: 0; right: 0; height: 2px; background: var(--border);
}
.timeline-item { width: 260px; flex-shrink: 0; position: relative; }
.timeline-item::before {
    content: ""; position: absolute; top: -24px; left: 20px; width: 12px; height: 12px;
    border-radius: 50%; background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--accent);
}
.timeline-year { display: inline-block; font-weight: 800; color: var(--accent); font-size: 1.15rem; margin-bottom: 8px; }
.timeline-content { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.timeline-content h3 { font-size: 1rem; color: var(--primary); margin-bottom: 6px; }
.timeline-content p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

/* ================= 产品介绍与 FAQ ================= */
.product-intro { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 18px; }
.product-intro h2 { margin-top: 0; }
.faq-list { margin-top: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 8px; padding: 14px 18px; margin-bottom: 10px; background: #fff; }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--primary); list-style: none; position: relative; padding-right: 22px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 0; top: 0; color: var(--accent); font-size: 1.2rem; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin-top: 10px; color: var(--text-muted); font-size: 0.93rem; }

/* ================= 产品页底部 CTA（浅灰全宽） ================= */
.product-cta { background: #f2f5f8; padding: 56px 0; text-align: center; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.product-cta h2 { color: var(--primary); font-size: 1.5rem; margin-bottom: 10px; }
.product-cta p { color: var(--text-muted); margin-bottom: 22px; }

/* ================= 新闻中心布局 ================= */
.news-layout { display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: start; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
    display: flex; gap: 18px; justify-content: space-between; align-items: center;
    border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px;
    background: #fff; color: var(--text); transition: 0.2s;
}
.news-item:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.06); border-color: var(--accent); }
.news-item-body { flex: 1; min-width: 0; }
.news-item-body h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 8px; line-height: 1.4; }
.news-excerpt {
    font-size: 0.9rem; color: var(--text-muted); line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 10px;
}
.news-meta { display: flex; gap: 18px; font-size: 0.8rem; color: #8a9aa8; }
.news-meta i { margin-right: 4px; }
.news-thumb { width: 160px; height: 100px; flex-shrink: 0; border-radius: 8px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-side { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: sticky; top: 130px; }
.side-title { font-size: 1.05rem; color: var(--primary); margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.side-title i { color: #e67e22; }
.hot-list { display: flex; flex-direction: column; gap: 2px; }
.hot-item { display: block; padding: 12px 0; border-bottom: 1px dashed var(--border); color: var(--text); }
.hot-item:last-child { border-bottom: none; }
.hot-item:hover h4 { color: var(--accent); }
.hot-item h4 { font-size: 0.9rem; line-height: 1.5; color: var(--primary); margin-bottom: 4px; transition: 0.2s; }
.hot-item span { font-size: 0.78rem; color: #8a9aa8; }

/* ================= 文章详情 meta ================= */
.article-meta { display: flex; justify-content: center; gap: 22px; font-size: 0.85rem; color: var(--text-muted); margin-top: 10px; }

/* ================= 客服团队 ================= */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.service-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; text-align: center; }
.service-card i { font-size: 1.8rem; color: var(--accent); margin-bottom: 12px; }
.service-card h3 { font-size: 1rem; color: var(--primary); margin-bottom: 8px; }
.service-card p { font-size: 0.88rem; color: var(--text-muted); }

/* ================= 响应式补充 ================= */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(3, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .awards-grid { grid-template-columns: repeat(3, 1fr); }
    .news-layout { grid-template-columns: 1fr; }
    .news-side { position: static; }
    .service-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid, .awards-grid, .reg-grid, .service-grid { grid-template-columns: 1fr; }
    .product-intro { flex-direction: column; gap: 10px; }
    .news-item { flex-direction: column; align-items: stretch; }
    .news-thumb { width: 100%; height: 160px; }
    .news-meta { flex-wrap: wrap; gap: 10px; }
    .timeline-item { width: 220px; }
    .product-cta { padding: 40px 0; }
    .product-cta h2 { font-size: 1.2rem; }

    /* 移动端交易产品子菜单居左对齐 */
    .main-nav.open { align-items: stretch; }
    .main-nav.open .nav-dropdown { width: 100%; }
    .main-nav.open .nav-dropdown-toggle { width: 100%; justify-content: space-between; text-align: left; }
    .main-nav.open .dropdown-menu { width: 100%; align-items: stretch; text-align: left; padding-left: 8px; }
    .main-nav.open .dropdown-menu a { justify-content: flex-start; text-align: left; }
}
/* ================= 页脚四栏（覆盖原三栏） ================= */
.footer-grid {
    grid-template-columns: 1.8fr 1fr 1fr 1.3fr;
    gap: 32px;
    align-items: start;
}
.footer-col a { display: block; }
.footer-col .icp a { display: inline; }

@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: 22px; }
}